| 宇宙核钟 |
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| 引用本文： | 戴光曦,孙志虹. 宇宙核钟[J]. 原子核物理评论, 2001, 18(3): 156-159. DOI: 10.11804/NuclPhysRev.18.03.156 |
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| 作者姓名： | 戴光曦 孙志虹 |
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| 作者单位： | 1 中国科学院近代物理研究所;2 甘肃工业大学基础科学系 |
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| 摘 要： | 以很长半衰期 ( 4 2× 1 0 9a)的 β-衰变的187Re-187Os核对作为大尺度的宇宙核钟来量度宇宙的年纪 ,是近代天文学与核物理学相结合的又一典范 .这种宇宙时钟是利用裸核187Re与它的衰变子体187Os同位素在共生矿中天然含量的比值来测定时间的 .利用187Re裸核的半衰期通过核物理计算可对中性 187Re的半衰期进行修定.To the great scale of the universe age, 187 Re- 187 Os isotopic pair, which have very long half life, was used as a cosmic nuclear clock of cosmochronometr. It is a typical relationship between modern astronomy and nuclear physics. The neutral isotope abundance ratio of 187 Re over daughter nucleus 187 Os in common growth mineral can be used as the clock to measure the time. After the 75 electrons in all shells of 187 Re were stripped ...
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| 关 键 词： | 宇宙核钟 哈勃常数 退行速度 中性/裸核187Re 同位素的天然含量 大爆炸 |
| 文章编号： | 1007-4627(2001)03-0156-04 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 2000-09-15 |
Cosmic Nuclear Clock |
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| AI Guang-xi,SUN Zhe-hong. Cosmic Nuclear Clock[J]. Nuclear Physics Review, 2001, 18(3): 156-159. DOI: 10.11804/NuclPhysRev.18.03.156 |
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| Authors: | AI Guang-xi SUN Zhe-hong |
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| Affiliation: | 1 Institute of Modern Physics; the Chinese Academy of Sciences; Lanzhou 730000; China 2 Basic Sciences Department; the University of Gansu Industry; Lanzhou 730050; China |
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| Abstract: | To the great scale of the universe age, 187 Re- 187 Os isotopic pair, which have very long half life, was used as a cosmic nuclear clock of cosmochronometr. It is a typical relationship between modern astronomy and nuclear physics. The neutral isotope abundance ratio of 187 Re over daughter nucleus 187 Os in common growth mineral can be used as the clock to measure the time. After the 75 electrons in all shells of 187 Re were stripped ... |
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